SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b32464e0c0f380b04c8dbfea1c74f89e46c3e8025c71249173282cff561b1075' 
  AND token = 'u0QKjeqdk+Evsj3Dc0IBMiFEx/B1TUvYsSRZC1KQpiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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