Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c27aa22034efd779d9cd8f043d353032a815ce40d22e8d94f25c4f5f296d766' 
  AND token = 'hrkEWOuLMvdS/XO3Fvy2kIBGBozVRpC16IuivOqPaeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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