SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6edefafa2994b2e37cef395cc6d15f31bbe95848839a80504e620b49843b8e8f' 
  AND token = '9H5dW2ZJZ8MhPBIi9ZRXDMgMiL3lzcVwcUKXr9+i/M4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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