Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee0e6dd150bd31dd7b85e522fe270e58717b91a246b5df74b251c95f28df8c50' 
  AND token = '2/SC0EBlu9vp/R6CxaUx5xmx4L7aaUee9dWvLr2jsHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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