Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cad3183c6c43e352c6bc7a9f51848ee584a3342aa78ce68367d59e0cb3c6ed6' 
  AND token = 'TfPTOJbkcA/lCoILDiRG8jQ1uTSNxtIvOXrRmuG7hQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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