Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1af442d6d106c1e209a89305f8366a5bbb1e630fc9f8d0e7331e250ce281c58' 
  AND token = 'AoBJnGU64fY34rDTJ49yMpOtFszWgl2Qer2pRT9DV8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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