Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa2cf56edd402027e20eeecbafda18c807b06f131fd25645674cc9fc2de13116' 
  AND token = 'tzGeLkvhi1MYDx6VMPKI3FUvCAUAlzwGSAOECCX5oVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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