Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb4ee460cdccb0b4e533c6694342b9481a1b60a2a243aefd4dc10dd77d06425f' 
  AND token = 'CE9Tvly0VpxCfUdzS+MeQWTyGHw5tdTXVB5DFJhw+F0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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