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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3208d837b8e26045d1076e4e210ab9a4a57195ad140310ce1fbde07c341ae476' 
  AND token = 'lEsY1OulWTSWpxBA7T3VpDYHSTQi7VvEpjoKuEUHYUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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