Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a0444733e1deb87ba907990a9d077eaf470a0de1819169ac2b7edc3ee97859d' 
  AND token = 'Q8JZ/mGZBOAVpJQ32jlvcxrq+l56mJaNdKCP+26FKjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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