Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4288559993d384c2f7e77d697b24e3476ef8955befba9d7534075097c642672b' 
  AND token = 'DW06qcC/ZvfoecU2HNy7qf7FopgzWWtbgCsw1bQT3go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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