Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56cda0f534472ef3389c55167cf3e31088c649df6332c566cca14b0b4f84c7c5' 
  AND token = 'RToK7tV1JFbcu4IW783+uVduZpNrN7o6yGafeG9gkMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}