Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e2d46b1cc3e6d31502399d1fab4c44dd5e951a4b4a50e2c9e534df88d240038' 
  AND token = 'CVcS+Bvpz5Fy9e4LySiVTZgKRg/IdaTuXrPRii7nvXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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