Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9938e4f40a10d6ea82301a69985f2a73dc34daaad81c3fc63140279453ae2563' 
  AND token = '8O+uo8jAHqFHQhTPU6E6gKZlNhUr0ePZI9tZWdC1czY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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