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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dea49eb0e64ae676a648ec4b13ddaf3e54b749fb17510803098d997d8482f98' 
  AND token = 'EP+8oXSsKG0uvGeuohPXmKWl/7za/W0DygoUTzG85Ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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