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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '860ac4c25b0de07899903aedba7113898a9086957b1fb5670032389ad0606e9b' 
  AND token = 'VndJ/geZQJS1Q/Cebc082ZFBOwMhMg98sXD5wPyrErE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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