Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0642ea93842248ae68471568cd352953e25c9aa6db2341afd608bd083c473081' 
  AND token = 'y9GrGf/3S/K27rv1tOiRoQz6bHtA6CslfwKn8575Las=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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