Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3e3a79110ee204274c780fd4b48a3784cf18a2f81e137a703ac0264912bb824' 
  AND token = 'cStfCAj7QG5FxQL6PeDMgkmRIZlWzFZi4uQvLagu/qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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