Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9386534eaf598fe107d387109198c1e960e43ac64629fa3ecfbc8e90f092c924' 
  AND token = 'SLXsu1nnMK0W03Pw9uoD6g8u3lfjFEOW6b2h5HVX668=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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