Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84368be2ad66417ef015b911668fe57cea43a3ef7478f5e2bb36424ff932071e' 
  AND token = 'zWTAn9HXNyce9yTV53BRnSlUDLcvKFuYdjVLyYw2Lb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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