Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '296966cd9d4dd55ddafd374f9df0789f919b261e6c72c52f383d0f027897811a' 
  AND token = 'Dyn2o3q5ENKGisHucVAby13gXqy6bnGdZQBEtcngpjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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