Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bc912427b68772c8a2a0a4dff1b0c41da551d4d13a60d48bd8423e2110cce05' 
  AND token = 'a5GwuPTr8FKhozjZTF4NXgDNPjFqxr45pQ7jwjpn/jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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