SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70982425dc168041ea27f42f67959bf13dfdfc70a3943d8657450b67e3014086' 
  AND token = 'ghjevpA2Lb8HbAKr8IMqTCtA77jB3HgAjr2qjVwv6+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}