Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1eea5ee0b86b31ee39e98cf3635ca12e9cff155c409327ed544669324d95388' 
  AND token = 'COdBSjS95U3iumFXmbonmb7lPKKCD7MOJ6yx+psyg6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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