Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d0b7fb30778f9eaa6cfb34ea733dc18d52eab5f7a6e535cec10d98a46db3616' 
  AND token = '83Um+BLqFo+nRUMDjN1GiT5w+yy+/OGN1lm9F5H+bw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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