Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '370adcb1a3acbdec650c38020e5094c391107f1b8cc7d5b6e129d0113aa84ca1' 
  AND token = 'QDKvVn+IhD4QHMiogM5YXkmCESb7dCooHCGAgp5ngek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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