Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7457a61c13a24f9bf0c06410d6a09eebfd11f4b995bb146b6dcf2de3d3412d3d' 
  AND token = 'YYpu5504x/MCI2084I9BX9gBGwOAiB1GcHUq5G06AgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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