Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca1edcac171b77def7d972cc5f0a8485882088f9de0ca213b312209e386aac9' 
  AND token = 'lqlUgffJqnfa5F7C3iMOTNbFStTEWCCccWkYNe077to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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