SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'db3159b466730ed4e2b3d84981098b5829a9463221781e4e3c69113456cff9a9' 
  AND token = 'Qwkh3E+LyhQ8QnY+cG5Xuna3sGyAjd45yjVoNFKnqC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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