Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fb12405cd8966004dd97f21ec6c558030e72bb60183c8ebfb82892d1e0cc35e' 
  AND token = 'IrngUc4WrERbadpgoHF82N8iKcE6mFazCXMJHxG5VGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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