Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02f9cb7248ab3451aa5c88f6c8177934e6aa9ba3a01aa39afe48fd86744e77c8' 
  AND token = 'p9WcurEcgz3EeIeB2pUDr6dGu8ULtGNkrOihNinGRII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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