Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '352776ae2c6035441af25c9a080a5daa7a8b11cafe650aeff2b3c25706b0d705' 
  AND token = 'cVeXHrjhlSx/Wrw740cv/S1Jqb7TOtBzuZ6CrsyC8vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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