Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c031d642f0c0f0baa643706e2bbe6886d94270270af802f7ec57e8809ed75cc4' 
  AND token = '0vQA9jePu34pMrD2BPBsbwt3ThrddBirrrHaYxL2j5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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