Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddc78ad65008890c02c9406098d8c67874b960a83ce51e16c6f8f0897b273078' 
  AND token = 'qTMVfR8ooQnjATAVXsgZZRWZvxq+j2OYi+iD7DWlbdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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