Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03374a56103ae84d6a7395f03f61817e110c025b828e7f7ab59df2a24c1145e8' 
  AND token = 'sU7Q0FRDP7ETcDRZZt5exdQ9B+Zzr9jOA4cGG5Kb5O8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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