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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2870f912b17450e1285d485a946ebba61e8c85c92563a991499012ce3abfc0ee' 
  AND token = 'Nq7KQFM/Q0pBNTZQyGFLvc+BlxmZo35di+pFEtX8DmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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