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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c5582bc3bd757349ce42551ed23ec7342593b2496e750392a1b4ece02a8c643' 
  AND token = '35zgXlh7r7lEIwmPdda3VJmgj2GOpOzittfweao/UIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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