Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '579d1a3ffc5581cde09b831eebe62c612de097ce16e456d41de4dc8e018d4b12' 
  AND token = 'WG5RVoC1KE+JwrNw0gJQf+4NpmA91vSPoqNAfKAAveU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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