Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c16bf722a83dfe42cdbb81dada11a68919aed0f108611ac6230bf45b3537f153' 
  AND token = 'Sy9Tdcc19HQ7L669sedDj2PS//xWARtK9wX4l5yfL1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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