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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5578f6a4130ffd91f0176f627f80fd2a011fbc5ad14971a1ed872f72409c533b' 
  AND token = '2w2iNuLmyZGZ6An9btT4LDIHWlQ1518YY+CUWVlESzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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