Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa92f2de31e79c3a8ae586ad5ccf860b7d920727bdf4aa13894323160b2d291' 
  AND token = 'KT+P4N6qUEjWN5Bs0oi7zkwu23M6NPh7YuEWnyCxfB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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