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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd065ba1370c749b158383f2d914cdcdcba0ab3f9161ef49319fa4ef78db18bb' 
  AND token = 'TboF1pa2k3Y4FICNjj3xVZenERdPy/EfjLJx2dJ1dBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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