Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57971ea5885528bae96af0d9a686a283f4d426066fa4455185f8361690a646af' 
  AND token = '+UiAajCiKrHIDAQQwb4t0VSDPFSKb+2EEGeTvMqoi8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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