Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f838913e683b873b33aa0a2e1de376cd447935321f9c9b4da87593ac69dc88f' 
  AND token = 'BUVxn3IrL+mmv7DWOnzNI8q9/tOiHtnicfOcJ2/SQuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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