Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1a1aa5647b6f645ce3302731cdeacc809d30a3c27acc95ee737d5a79a2cd747' 
  AND token = '1oax5+OPFw7wclMTIZN7UhRGTei5D+NSeqVONQH7z6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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