Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b919cd1547fe4a0ebe72f5cfcee15dfec237dda81564266f11c8724f889fa19' 
  AND token = 'jCmBOK7EiV00/NuOh9HjxZpa0FN8CfRTnB+ja4CcXeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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