Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c7f54a22a0be4e15bc3a673ce0efad86d7e2aa13793b702b2f997578bce952d' 
  AND token = 'C+Nw981vTH9tkvoJyYufw1W8c50a8EdrM4QwnI5rU78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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