Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '325555715efab04d521d49e255084ba738c179f14bd29e1105ced32b9d6d4fb9' 
  AND token = 'YsVm7Jr7W1Lsfrqyt419ez82p/HF8uSUddwNLNcaqqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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