SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccf8f91bd2f1108297bf1d82a478533e0c8d8da39a359e67041eb8c2836f6525' 
  AND token = 'WcRfpHzqhGd4/CbP2WU4dJszmUX6pSVhOSlBZ1h9rog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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