Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38b921465724921fa108ac50b375658875e394738f808ecd0852cdffcb77d910' 
  AND token = 'AiCzq9ly3vSNCyM6SgsmlpMYCTMXmiJs9R1FwUvOsfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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