Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '3718f427fd058bbafee92740efc65aa05392ad732ba93c1af9bb310ba5133d54' 
  AND token = 'ZHaX99bCvjTi2vMIifcGnhcs3QaQSp+SOrxIfcpZ778=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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