Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8debc07a2971e56bad4bdcab8287c4d3a88d27c7da74f649d2055dcb3a2c42b' 
  AND token = '+MM4c+BwlbnGnANj8iM+FXXlFsikamNAc+sCWLB4v70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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