Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eae89958cc024bf23d72518761f51e57f925c3a9269abc1c04170445666dccc' 
  AND token = 'Nh9abYVxGvI2asXfW0Ahw2ulZai2UB8HwYFZ0kXV6yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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