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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9601510c7ad46519b6f5f83f8846445eda09d6ba4189f7df5510b32df0a73360' 
  AND token = 'YhOJeNIS7oqr7jfLfm9dauvYhC8YTtWwOYKlyRDmD/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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