Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b8aa80fcb86db19901a0e7a00d1adbd14ef0e091720053c32e4fbcecb416b00' 
  AND token = 'jVPWZuNTN5SuCn8PIYUZgDabZY31jwB8TYqrcTRaCmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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