Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '103216d3344b52fd64d87b7e99050989509be4615c87bfb9ae2eeae381738d6b' 
  AND token = '8Q1ennhqK76w/bXDNA2rdHq7o/brxwORQH+BC1OmH4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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