Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d03f1ed64e380021e8ccd36928658c6b4c282b7d21085443ea53a5a0f355823' 
  AND token = '3iManvj3bolhX2UBsgaZTrVaGy2zk7mP5dE/3JnH3XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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