Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac608f3bbcf64ff3389bdc4f29881831ef7787d2c86c7d75f36c660cc0a78144' 
  AND token = 'e1me8uJXgeugSLZjRX8Nvp+ABfmyxXI+ptXyRAckZ/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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