Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41cd58c0c056b1d0aa9a2d61e6a0dc5d3afb6b910a813703c794733ccb5339fa' 
  AND token = '7A6An2hTt30uosOEzGsr8EkXMvZrHeh/jsjGoCap7qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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