Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b655c0522cd29147b7b1b95011b64ea2e0fe2184750bd0c56f1065954a0c2f1f' 
  AND token = 'lb34A5mSgM954IZyhn3gDfjS9V/F+JQALSKPT9rdN3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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