SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa5a61a14334ab2fe5f3d501e91a97446d89bfd302d8cab21688cb27ac5b8723' 
  AND token = 'gPbBQ+3LSKfNJoGyoui5R/S/ggzl6YjoA3dSInEQB4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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