Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af8a24be838857e76aa2aa2c07d7f9df6907571f1ea6692d6a4d9e54d12242c2' 
  AND token = 'Y7hrarJKSAUaDT2474fY4ALtGnPZcypSzjYCfVCDWPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}