Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a0262577e2754921a33882fd1f2be0cfcee7f4ea837f6f6f41570cfd825d69e' 
  AND token = 'mot6DAcc9Ok2lwPcihbPocvKDxr+SAXOoce7AMG9UZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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