Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24068befbab9ee20ce197bc472defb4f7054b526485f9ce166a64e49ecd6271' 
  AND token = '5oLSeY05m/Ov6MxxDsI3gfpGyDOHCUewVjbGEk2tT84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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