Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ffadf179b68801b8cf99610fa5bba6bbf4c5b6dce43ea460d6f42374251b329' 
  AND token = 'jDtQmSTwMfMv0pf+rFaUp4QF9dHWfirSgVwShCP3IwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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