Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3fbea36996fc2ea268f43d4dc1bed75d790b045f5e3d91e3f9e4b98ef9a40b2c' 
  AND token = 'HNtEzgypRUx8HM1zAmVtea8UnIOknluVkg4szv9ZRrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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