Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e18acbbafab45b69e5890e4362da9ddaeae91f374cb74c5e05cc150d83749a4c' 
  AND token = 'm3n+prgyBHrqccezZp0AF1J5kQvxaRiZBwYZRXaFw/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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