Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '471c1083f172efec0989d78a6bd709c437c148f7b48dd1993e95a35f042d07de' 
  AND token = 'un26kCe2c+qWaUf4873EVkciPUpB7I+6AzTikimJmQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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