Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08c4ab6367750cd3af74352aae049be76868b0fcc9cd2b8fd24d4819e18251ba' 
  AND token = 'S7EzexUq0odUCPgYkamJVpfl5wNWLlcVm93YJLTqApM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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