Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f294dcaf370f205f0a8b49404e32148d79ec5bfb9102eded52e2026a546851b' 
  AND token = 'h/4DATzQYA3drSjU0NIB8CKsTryeXfllphEPoTePQSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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