Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b125ef4c2d84a77e1cde84827abd10c0006c47b142f3d967b03918a4ffdbefb' 
  AND token = 'OCcqXpDyCVKstDjXR1XcGWZMvf5uJu+iAP8sdqSMD4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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