Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c543c3c580fa796c87fb18e03c8553e28a80fac6538328bc5bbc3424432b6b61' 
  AND token = '/Sxjad5Bfuw3H2fFegNK1ex0JZI3lGMGIkM6oJw/VXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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