Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f326ebff023f326d56c5585dd1494754bdddefd6f7e7bda7cc62d6b402471c4' 
  AND token = 'dsbuwlDTsyL8/OqCTQcny95TRwkvrLWOYD3kasZdLCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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