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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ed8ef2418f75cac48c88efc32898e7fe596495f3582747e1a2ea79a1a0c3be' 
  AND token = 'tj7EaIXv8W23bi9gfxnkbQ/lopWlHJGnIu43lz1u09c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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