Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '101d9504074a3d674d7eb88abcc282ffc9b71fd393d392ebd4acea6ad6e66c73' 
  AND token = '2Xq26GQXNr76X2Sgl4DBmOLGB67be1+ORGhrKnrUB0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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