Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b860d948d6a96245fe17cb5654be4c7cc075d5bab622f2985bca0e24c8392d9f' 
  AND token = 'mOXiCXP+73LRG7TTPs1zxn/WsjPIE4UQtgYmia6FG1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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