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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd01709ee439b3bd5c8a2a69c19280db6ec5d5c84b98a0d8b439e0dc161bb765e' 
  AND token = 'GV1wA7WXzC6v8/GutF5ecX+G2aPy/APg4xg9LVY75PY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}