Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad642772874a53456ce3940e9d57afed11706b0073775c5177848c1a6700797' 
  AND token = 'JoLHcMVsXMADSTIu1IyL2bRJL9b/xTQV5YYPe5g6QPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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